Gottleib Sinbad

[DaveScheffel]

Hi all, first time visitor.
When I turn on the power, it won't reset but all the lights come on and there is a high pitched sound. I didn't touch for months then one day I turned it on, everything was fine for 3 or 4 games then shut down. I powered off and then on and I have the same original problem. Any ideas/ easy fix??

 

[luch]

try reseating all the connectors on the boards in the backbox , you do have credits in the game to start the game ?

 

[slacker]

After reseating all the connections also check the switch in the ball trough to make sure its working and the ball is hitting it. Some games have a switch on the coin door as well so make sure the door is closed.

 

[sylvain]

You need a voltmeter/multimeter to check the +5V (and +12 and -12 volts) arriving on the MPU board from the power supply.
Having the game manual would also help in showing where to measure on the MPU
(a good voltage input to the MPU checkpoint is across each of the two electrolytic capacitors on the center left
of the MPU board near the power harness connector).

Often these games will freeze if the voltage is too low due to a misadjusted or dirty potentiometer +5V ADJ
on the power supply board, or weak/corroded pins in the power supply to MPU board harness.

There are guides on the web providing tutorials on how to measure voltages with a multimeter, if you are not sure how to do this safely.

- Sylvain.